You also have to determine what style of offense and defense your new coaching staff wants to run. There is no sense adding players who don't fit your new coordinators' systems.
Next, you must understand this is a two-year rebuild, at least. You're miles behind every other team in your division – the Broncos and Chiefs are for-sure playoff teams and the Chargers might make the playoffs, too. Adding one franchise player will not propel the Raiders into the playoffs next season.
You need at least two offensive linemen, a tight end, a running back, a quarterback (obviously), at least one wide receiver, two cornerbacks, a safety, two linebackers and two or three defensive linemen. You should have traded Darren McFadden earlier this year, but you didn't. You will get nothing for him when he leaves in free agency.
You need to add 17 or 18 players to the roster this offseason via free agency and the draft, mostly the draft. If you sign too many players in free agency, you'll put yourself right back into Salary Cap Hell, so limit yourself to four free agents.
If you can, sign these four: sack specialist Brian Orakpo, cornerback Walter Thurmond III, wide receiver Golden Tate and tight end Greg Olsen.
See, I'm making it easy for you, Reggie.
Don't waste your cap space by signing a quarterback. Quarterbacks are expensive in free agency. Draft your quarterback like Bill Walsh drafted Joe Montana. That's the model.
It appears you're going to have the No. 3 pick in the upcoming draft. I know it's tempting to use that pick on a quarterback.